[1] Univ Western Ontario, Dept Earth Sci, London, ON, Canada
[2] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90024 USA
[3] Univ Clermont Auvergne, Lab Magmas & Volcans, Clermont Ferrand, France
[4] Friedrich Alexander Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Erlangen, Germany
[5] Univ New Mexico, Inst Meteorit, Albuquerque, NM 87131 USA
[6] Univ Bayreuth, Bayer Geoinst, Bayreuth, Germany